Tool



June 20,1933. F. T. HARRINGTON I a I I ATTOHNE June 20, 1933.

F. T. HARRINGTON TOOL Filed Feb. 1, 1932 2 Sheets-Sheet 2 ZzfiJE.

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Patented June 20, 1933 UNITED STATES PATENT OFFICE FERRIS T. HARRINGTON, OF DETROIT, MICHIGAN, ASSIGNOR TO WHITMAN & BARNES, INCORPORATED, OE DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN TOOL Application filed February 1, 1932. Serial No. 590,251.

This invention relates generally to cutting tools such as those designed for milling, boring, reaming, facing and the like and refers A more particularly to the manner in which the removable cutting elements such as teeth or blades are held therein.

One of the essential objects of the invention is to provide a cutting tool wherein the cutting elements are capable of being adjusted either axially or radially of the disc forming the body of the tool and may be readily and positively held immovable in such ad usted positions.

Another object is to provide a tool wherein the cutting elements are backed throughout substantially their entire area by a part of their retainlng or holding means whereby the projecting portions of such elements are braced and materially reinforced; there 15 less tendency for such elements to chatter; and the life .of the cutting elements is prolonged.

A further object is to provide a tool that s simple in construction and that can be 1nanufactured at a comparatively low cost.

Other objects, advantages and novel details of construction of this invention Will be made more apparent as this descriptionproceeds, especially when considered in connection with the accompanying drawings,

' wherein:

Figure 1 is a fragmentary s1de elevation of a tool embodying my invention;

Figure 2 is an edge elevation of the construction illustrated in Figure 1 Figure 3 is a detail view of one of the blades; 7 1

Figure 4 is an edge elevation of the blade illustratedin Figure 3;

Figure 5 is a top plan vlew of the blade illustrated in Figure 3;

Figure 6 is an elevation of one of the wedges;

Figure 7 is an end View of the wedge illustrated in Figure 6;

Figure 8 is a top plan view of the wedge illustrated in Figure 6;

Figure 9 is a view similar to Figure 1 but showing a slight modification;

Figure 10 is an edge elevation of the construction illustrated in Figure 9;

Figure 11 is a detail elevation of one of the blades illustrated in Figures 9 and 10;

Figure 12 is a top pan View of the blade illustrated in Figure 11;

Figure 13 is an end elevation of the blade illustrated in Figure 11;

Figure 14 is a detail elevation of one of the wedges illustrated in Figures 9 and 10;

Figure 15 is a top plan view-of the wedge illustrated in Figure 14;

Figure 16 is an end elevation of the wedge illustrated in Figure 14.

Referring now to the drawings, A is the body, B are the blades or teeth, and C are the cooperating wedges of a tool embodying my invention. As shown, the body A comprises a relatively thick disc having a central opening 1 and spaced peripheral slots or channels 2. Preferably these slots 2 extend obliquely to the axis of the disc from one side of the latter to the other, and alternate slots extend in opposite directions, preferably in convergent planes. As shown in Figure 2, the longitudinal edges 3 and 4 of each slot are parallel while the faces 6 and 7 respectively of each slot converge inwardly from said edges toward the base 5 of each slot. Preferably the converging faces are at a sufiiciently small angle such 'as two degrees to seven degrees relative to each other so that the blades B and wedges C will be urged toward one another when inserted into the slots. One side 6 and the base 5 are plain/ 85 while the other side 3 is provided with longi, tudinally extending serrations 7. The blad (s B are substantially rectangular in shape and each is provided at the top and one end with beveled cutting edges 9 and 10 respectively. Preferably each blade B is provid ed upon its forward face with longitudinal serrations 11 for engagement v with the longitudinal serrations 7 and is provided upon its rear face with transversely extending serrations 12. 95 The wedges C have transversely extending serrations 1'3upon their forward faces for engagement with the serrations 12 upon the 7 rear faces of the blades and have plain rear 1 faces 14 substantially conforming in inclinawith a rearwardly extending flange and suc v flan e may be located on the proper side of the ody A to withstand the cutting thrust. Thus with this construction the lades B may be positioned within the slots 2 with cutting ed es thereof upon opposite sides of the disc for cutting grooves or channels in the work, the desiifed width of the out being determined by the adjustment of the blades longitudinally ofthe slots. Moreover, adjustment in both 'idircctions, i. e., longitudinally and radially, may be made at any time to compensate forti'wlear. Due to the engagement of the serrations 11 with the serrations 7, the engagement of the serrations 12 with the serrations lti aiid of the flanges 15 and 16 with opposite. sides of the disc A, the wedges C will effectively retain the blades B against movement in oth directions. In this connection it is important to note that the wedges C and'not the blades B straddle the disc A for if it were otherwise the blades could not be adjusted in two directions as just described. Moreover it should be noted that the wedges constitute backers for the blades throughout,substantially their entire area and thereby brace the overhanging or projecting edge-' pprtions thereof providing the maximum rigidity. Consequently there is less tendency to chatter and the life of the cutting elements is accordingly prolonged.

While it is believed that rom the foregoing description the nature and advantagesof the invention will be readily apparent, I desire to have it understood that I do not limit myself to what herein shown and described and that such 'changes may be resorted to when desired as fall within the scope of what 451 is claimed. For example, the arrangement of serrations 13, 12, 11 and 7 and of the blades B and wedges C may be reversed so that the serrations 7 will be upon the rear faces 4 of the slots 2 if desired, in which event the flanges 15 and 16 would extend forwardly and engage opposite sides of the disc A in advance of the slots 2. It is also contemplated to have all of the blades inclined in the same direction in the body with cutting edges at the periphery and one side only, or only at one side so that such devices may be used as faces and/or side milling cutters or end mills. Moreover the slots 2 may extend at substantially right angles to the periphery of the disc A, as illustrated in Figures 9 and 10. hen this is done the blades designated B may have three cutting edges 20, 21 and 22 respectively at the top and opposite ends thereof, and the wedges designated 0 are con st'ructed as illustrated in Figures 14 to 16 inclusive. In each instance the desirable results heretofore mentioned are obtained.

What I claim as my invention is:

1. In a tool, a body having an outwardly opening slot, a cutting element in said slot having a cutting portion projecting beyond the side of said body, said cutting element having a face engaging a side wall of said slot and said face of the cutting element and said side wall of said slot having cooperating portions operating to prevent movement of said cutting element in one direction in said slot, and a wedge member disposed between said cutting element and the other side wall of said slot, said wedge member having a flange engaging a side of said body to pre-. vent movement of said wedge member in one direction in said slot, said flange constituting a reinforcement for the projecting side cutting portion of'said cutting element.

2. In a tool, a body having an outwardly opening slot, a cutting element in said slot having a cutting portion projecting beyond the side of said b0dy, said cuttin element having a face engaging a side wa l of said slot and said face of the cutting element and said side Wall of said slot having cooperating portions operating to prevent movement of said cutting element in one direction in said slot, and a wedge member disposed be- 90 tween said cutting element and the other side wall of said slot, said wedge member having flanges engaging opposite sides of said body to prevent movement of said wedge member in one direction in said slot, oneof said flanges constituting a reinforcement for the projecting side cutting portion of said cutting element.

3. In a tool, a body having an outwardly opening slot, a cutting element in said slot having cutting portions projecting beyond opposite sides of said body, said cutting element having a face engaging a side wall of said slot and said face of the cutting element and said side wall of said slot having cooperating portions operating to prevent movement of said cutting element in one direction in said slot, and a wed e member disposed between said cutting e ement and the other side wall of said slot, said wedge member having flanges engaging the opposite sides of said body to prevent movement of said wedge member in one direction in said slot, said flanges constituting reinforcements for the projecting side cutting portions of said cutting element.

4. In a tool, a body having an outwardly opening slot. a cutting element in said slot having a cutting portion projecting beyond the side of said. body, said cuttin element having a face provided with longitudinally extending serrations engageable with corresponding serrations on the adjacent side wall of said slot to prevent movement of said outting element transversely of said slot, and a wedge member disposed between said cutting element and the other side wall of said slot, said wedge member havin transversely extending serrations engagea le with corresponding serrations on the adjacent face of said cutting element to prevent movement of said cutting element longitudinally of the slot with reference to the wedge member, said wedge member being also provided with flanges engaging opposite sides of said body to prevent movement of said wedge member longitudinally of said slot, one of said flanges constituting a reinforcement for the roject ing side cutting portion of said cuttlng element. r

In testimony whereof I afiix my signature.

'FERRIS T. HARRINGTON. 

